import 'dart:math';

import 'package:flutter/material.dart';

import 'fx_pie_chart.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a purple toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  double circleRadius = 50;
  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Row(
        children: [
          Expanded(
            child: Container(
              color: const Color(0xffF7F8FA),
              child: Container(
                margin: const EdgeInsets.symmetric(horizontal: 12),
                padding: const EdgeInsets.symmetric(horizontal: 10),
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8),
                  color: Colors.white,
                ),
                child: Column(
                  children: [
                    const SizedBox(height: 12,),
                    const Text("优势劣势"),
                    const SizedBox(height: 12,),
                    Stack(
                      children: [
                        Container(
                          // color: Colors.green,
                          child: Wrap(
                            runSpacing: 10,
                            spacing: 10,
                            children: <Widget>[
                              Container(
                                width: 160,
                                height: 112,
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(6),
                                  color: const Color(0xffFDF7F2),
                                ),
                                alignment: Alignment.bottomRight,
                                child: Container(
                                  color: const Color(0xffFDF7F2),
                                  width: 50,
                                  height: 50,
                                  child: CustomPaint(
                                    painter: DetailCustomCirclePainter(
                                        drawStartAngle: pi,
                                        color: Color.fromARGB(Random().nextInt(255), Random().nextInt(255), Random().nextInt(255), Random().nextInt(255)),
                                        drawRect: Rect.fromLTWH(0, 0, circleRadius * 2, circleRadius * 2),
                                    ),
                                  ),
                                ),
                              ),
                              Container(
                                width: 160,
                                height: 112,
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(6),
                                  color: const Color(0xffFDF7F2),
                                ),
                                alignment: Alignment.bottomLeft,
                                child: Container(
                                  color: const Color(0xffFDF7F2),
                                  width: 50,
                                  height: 50,
                                  child: CustomPaint(
                                    painter: DetailCustomCirclePainter(
                                      drawStartAngle: pi * 3 / 2,
                                      color: Color.fromARGB(Random().nextInt(255), Random().nextInt(255), Random().nextInt(255), Random().nextInt(255)),
                                      drawRect: Rect.fromLTWH(- circleRadius, 0, circleRadius * 2, circleRadius * 2),
                                    ),
                                  ),
                                ),
                              ),
                              Container(
                                width: 160,
                                height: 112,
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(6),
                                  color: const Color(0xffFDF7F2),
                                ),
                                alignment: Alignment.topRight,
                                child: Container(
                                  color: const Color(0xffFDF7F2),
                                  width: 50,
                                  height: 50,
                                  child: CustomPaint(
                                    painter: DetailCustomCirclePainter(
                                      drawStartAngle: pi / 2,
                                      color: Color.fromARGB(Random().nextInt(255), Random().nextInt(255), Random().nextInt(255), Random().nextInt(255)),
                                      drawRect: Rect.fromLTWH(0, -circleRadius, circleRadius * 2, circleRadius * 2),
                                    ),
                                  ),
                                ),
                              ),
                              Container(
                                width: 160,
                                height: 112,
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(6),
                                  color: const Color(0xffFDF7F2),
                                ),
                                alignment: Alignment.topLeft,
                                child: Container(
                                  color: const Color(0xffFDF7F2),
                                  width: 50,
                                  height: 50,
                                  child: CustomPaint(
                                    painter: DetailCustomCirclePainter(
                                      drawStartAngle: 0,
                                      color: Color.fromARGB(Random().nextInt(255), Random().nextInt(255), Random().nextInt(255), Random().nextInt(255)),
                                      drawRect: Rect.fromLTWH(-circleRadius, -circleRadius, circleRadius * 2, circleRadius * 2),
                                    ),
                                  ),
                                ),
                              ),

                            ],
                          ),
                        ),
                        Positioned.fill(
                          child: Align(
                            alignment: Alignment.center,
                            child: Container(
                              width: 100,
                              height: 100,
                              decoration: BoxDecoration(
                                color: Colors.white,
                                borderRadius: BorderRadius.circular(100),
                              ),
                            ),
                          ),
                        ),
                      ],
                    ),
                  ],
                ),
              ),
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

class DetailCustomCirclePainter extends CustomPainter {

  DetailCustomCirclePainter({required this.drawStartAngle, required this.color,required this.drawRect});
  double whiteSpace = 0.08;
  late double perAngle;
  double radius = 5;
  final double drawStartAngle;
  final Color color;
  final Rect drawRect;
  @override
  void paint(Canvas canvas, Size size) {
    perAngle = (pi/2 - 3 * whiteSpace) / 4;
    double startAngle = drawStartAngle;
    Paint _paint = Paint()
      ..color = color
      ..strokeCap = StrokeCap.round
      ..isAntiAlias = true
      ..strokeWidth = 2
      ..style = PaintingStyle.fill;
    for(int i = 0 ; i < 4; i ++) {
      canvas.drawArc(drawRect, startAngle, perAngle, true, _paint);
      startAngle = startAngle + perAngle + whiteSpace;
    }
    Paint whitePaint = Paint()
      ..color =   const Color(0xffFDF7F2)
      ..strokeCap = StrokeCap.round
      ..isAntiAlias = true
      ..strokeWidth = 2
      ..style = PaintingStyle.fill;
    canvas.drawArc(drawRect.inflate(-radius), drawStartAngle, pi/2, true, whitePaint);
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }

}
